SBAS771C June   2017  – February 2020 AMC1303E0510 , AMC1303E0520 , AMC1303E2510 , AMC1303E2520 , AMC1303M0510 , AMC1303M0520 , AMC1303M2510 , AMC1303M2520

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Power Ratings
    6. 7.6  Insulation Specifications
    7. 7.7  Safety-Related Certifications
    8. 7.8  Safety Limiting Values
    9. 7.9  Electrical Characteristics: AMC1303x05x
    10. 7.10 Electrical Characteristics: AMC1303x25x
    11. 7.11 Switching Characteristics
    12. 7.12 Insulation Characteristics Curves
    13. 7.13 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Analog Input
      2. 8.3.2 Modulator
      3. 8.3.3 Isolation Channel Signal Transmission
      4. 8.3.4 Digital Output
      5. 8.3.5 Manchester Coding Feature
    4. 8.4 Device Functional Modes
      1. 8.4.1 Fail-Safe Output
      2. 8.4.2 Output Behavior in Case of a Full-Scale Input
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Digital Filter Usage
    2. 9.2 Typical Applications
      1. 9.2.1 Frequency Inverter Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Isolated Voltage Sensing
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curve
      3. 9.2.3 What To Do and What Not To Do
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Device Nomenclature
        1. 12.1.1.1 Isolation Glossary
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Community Resources
    6. 12.6 Trademarks
    7. 12.7 Electrostatic Discharge Caution
    8. 12.8 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.4 Digital Output

A differential input signal of 0 V ideally produces a stream of ones and zeros that are high 50% of the time. A differential input of 250 mV (for the AMC1303x25x) or 50 mV (for the AMC1303x05x) produces a stream of ones and zeros that are high 89.06% of the time. With 16 bits of resolution on the decimation filter, that percentage ideally corresponds to code 58368. A differential input of –250 mV (–50 mV for the AMC1303x05x) produces a stream of ones and zeros that are high 10.94% of the time and ideally results in code 7168 with a 16-bit resolution decimation filter. These input voltages are also the specified linear ranges of the different AMC1303 versions with performance as specified in this document. If the input voltage value exceeds these ranges, the output of the modulator shows nonlinear behavior where the quantization noise increases. The output of the modulator clips with a stream of only zeros with an input less than or equal to –320 mV (–64 mV for the AMC1303x05x) or with a stream of only ones with an input greater than or equal to 320 mV (64 mV for the AMC1303x05x). In this case, however, the AMC1303 generates a single 1 (if the input is at negative full-scale) or 0 every 128 clock cycles to indicate proper device function (see the Fail-Safe Output section for more details). Figure 46 shows the input voltage versus the output modulator signal.

AMC1303E0510 AMC1303M0510 AMC1303E0520 AMC1303M0520 AMC1303E2510 AMC1303M2510 AMC1303E2520 AMC1303M2520 ai_anain-modout_bas512.gifFigure 46. Analog Input versus AMC1303 Modulator Output

Equation 1 calculates the density of ones in the output bit-stream for any input voltage value (with the exception of a full-scale input signal, as described in theOutput Behavior in Case of a Full-Scale Input section):

Equation 1. AMC1303E0510 AMC1303M0510 AMC1303E0520 AMC1303M0520 AMC1303E2510 AMC1303M2510 AMC1303E2520 AMC1303M2520 q_vin_bas771.gif

The AMC1303 internally generates the clock signal required for the modulator. This clock is provided externally at the CLKOUT pin on AMC1303Mx devices only. For more details, see the Switching Characteristics section.